The Classic isn't going away until the iPod Touch capacity catches up with it. And flash memory prices haven't dropped to the point to make that affordable yet.
I wouldn't be surprised to see the Classic get a camera, for no other reason than Apple needs a reason to maintain a price point. That being said, it could still drop by $50 if they don't bump the capacity.
Also - there have been
rumors of the Nano with a camera dating back from May.
Wifi in the Nano and Classic is an intriguing possibility, but unlikely. Wifi just for uploading pictures is probably not worth the additional cost. And neither one is likely to get a mobile web browser or mobile anything without some sort of keyboard.
Based on current rumors, expect to see:
iPod Touch - 16GB, 32GB, 64GB - $199 / $299 / $399
iPod Classic 120GB with camera - $249 (maybe $199?)
iPod Nano - 16GB, 32GB with camera - $149 / $249
They are certainly pushing the Classic outside behind the barn, but I don't think they're going to put it out of its misery just yet.